A tooth-wound coil of a stator or of a stator segment of a dynamo-electric machine having two straight sections spaced apart from each other and running substantially parallel. Two 180? curves are located on the ends thereof, wherein the straight sections have an active part area, the axial extend of which is less than or equal to that of the straight section. The tooth-wound coil has a symmetrical extension plane running in the longitudinal direction. An insulation material is provided around the straight sections of the tooth-wound coil. The material effects groove isolation and/or phase isolation in the stator or stator segment.

A method of manufacturing a stacked stator core comprises forming a stack that comprises an annular yoke portion, a plurality of tooth portions, and a plurality of slots. The method further comprises inserting a mold core member of the plurality of mold core members into a slot of the plurality of slots, the mold core member comprising a body portion and a closing portion connected to the body portion, the body portion extending along a longitudinal direction of the slot and spaced apart from an inner wall surface of the slot, the closing portion being positioned on a slot opening side of the slot and closing an open end portion of the slot on the slot opening side. Additionally, the method comprises forming a resin portion by charging a melted resin into a filling space between the slot and the mold core member.

Provided are a method and a tool for manufacturing a coil assembly of an electric motor for a deep well vertical turbine pump with a stator assembly that has a stator bore to receive a rotor and slots radially open to the inside which are respectively separated from each other by a stator tooth and in which electrical conductors of coils of the coil assembly lie, forming distributed windings and, at one axial end of the coil assembly, a winding head. The coil assembly is manufactured by shaping and encapsulating the coils within the tool so that the winding head extends only between an inner diameter and an outer diameter that is smaller than the diameter of the stator bore in order to enable axial insertion of the coil assembly into the stator assembly leading with the winding head in which the coils are respectively wound individually, drawn into the tool as wire bundles and encapsulated within it.

An electric motor as well as a manufacturing method for the electric motor and a manufacturing tool are provided, the electric motor being for a deep well vertical turbine pump and having a stator assembly that has a stator bore to hold a rotor and slots that are radially open to the inside, respectively separated from each other by a stator tooth, and in which electrical conductors made of round wire of coils of a coil assembly lie, with the distributed windings on one axial end of the coil assembly forming a winding head in which the coils are encapsulated. The winding head only extends between an inner diameter and an outer diameter which is smaller than the diameter of the stator bore in which the coil assembly is inserted axially into the slots of the stator assembly.

A rotary electrical machine includes a stator and a rotor. The stator includes a plurality of iron cores that are annularly disposed, windings that are wound to each of the plurality of iron cores, connection terminals to which the windings are connected to, and molded members that partially cover the plurality of iron cores and the windings. The rotor rotates around an axis that coincides with a circular center of the plurality of iron cores. The molded members have resin portions that cover the plurality of iron cores and the windings, and a plurality of exposed terminal portions that expose the connection terminals.

The invention relates to a method for installing coil groups in an electric machine (100), each coil group (104, 204) comprising at least one coil, each coil being composed of a plurality of turns of conductors, characterized in that it comprises, for each coil group (104, 204), the following installation steps applied to each coil group before being applied to the following coil group: a step of inserting a first coil group into at least two free or partially occupied slots (106) of the electric machine (100), the coil portions arranged outside the slots forming the coil heads, a definitive shaping step by compacting the heads of the coils of said coil group into a predetermined shape, by a preconfigured apparatus.

A rotor core includes laminate steel plates extending in a radial direction with respect to a central axis. The laminate steel plates each include a base portion on a radially outer side of the central axis, and pieces separately disposed on a radially outer side of the base portion with penetrating portions therebetween, and arranged side by side at predetermined intervals in a circumferential direction. The laminate steel plates are laminated in an axial direction. The laminated steel plate at an upper end in the axial direction includes at least one of an outward projection extending radially outward from an outer edge portion of the base portion and an inward projection extending radially inward from an inner edge portion of the piece, and the laminated steel plate at a lower end in the axial direction includes an intervening portion between the base portion and the piece portion.

To effectively cover a coil end with a resin layer. A method for manufacturing a stator includes a first resin layer forming step (ii) of forming a first thermoset resin layer by impregnating the tip end side of a coil end with first thermoset resin, the coil end protruding from the core of the stator, the first thermoset resin having liquidity; a second resin layer forming step (iii) of forming a second thermoset resin layer on the first thermoset resin layer by dropping second thermoset resin from the core side of the coil end toward the tip end side; and a curing step of curing the first thermoset resin and the second thermoset resin.

The alignment method of the electrical conductors includes an aligning step of aligning a plurality of electrical conductors 40 in an annular shape while being overlapped in a circumferential direction of the annular shape by moving gripping devices 230 inward in a radial direction of the annular shape, in which the gripping device 230 has a pair of claws 232g1 and 232g2 capable of pinching one leg portions 41 of the substantially U-shaped electrical conductors 40 one by one, one claw 232g1 has a length capable of gripping one leg portion 41, and the other claw 232g2 has a length capable of gripping one leg portion 41 of one substantially U-shaped electrical conductor 40-1 and gripping the other leg portion 44 of the other substantially U-shaped electrical conductor 40-2.

A rotor has a rotor core with protruding fingers defining slots for conductors and support blocks at the axial ends of the fingers fixed by screws. The fingers have holes for housing the screws. The method for repairing the rotor includes removing the screws and support blocks, drilling the holes to increase the diameter thereof, providing plugs into the holes.